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A Bidirectional Quasi-Endfire Patch Antenna with Low Elevation Angle.

Ziling Zhou1, Jin Shi1,2, Gu Liu1

  • 1School of Information Science and Technology, Nantong University, Nantong 226019, China.

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Summary
This summary is machine-generated.

This study presents a novel bidirectional quasi-endfire patch antenna with a low elevation angle, ideal for vehicle, airborne, and shipborne wireless communications. The antenna achieves a ±28° low elevation angle and a compact structure, outperforming existing designs.

Keywords:
bidirectional radiationlow elevation anglepatch antennaquasi-endfire

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Area of Science:

  • Electromagnetics and Wave Propagation
  • Antenna Theory and Design
  • Wireless Communication Systems

Background:

  • Vehicle-based, airborne, and shipborne wireless systems require antennas with low elevation angles for efficient communication.
  • Existing dual-beam patch antennas often lack the desired low elevation angle or compact structure.

Purpose of the Study:

  • To design and demonstrate a novel bidirectional quasi-endfire patch antenna with a significantly low elevation angle.
  • To achieve a compact antenna structure suitable for mobile wireless communication platforms.

Main Methods:

  • Integration of shortened patch resonators and an open patch resonator.
  • Utilizing TM20 mode for bidirectional radiation and TM01/TM20 modes in shortened resonators for beam tilting.
  • Fabrication and measurement of a prototype antenna operating at 3.5 GHz.

Main Results:

  • The proposed antenna achieves a low elevation angle of ±28°.
  • Demonstrated a -10 dB impedance matching bandwidth from 3.44 GHz to 3.61 GHz.
  • A prototype with two pairs of directors further reduced the elevation angle to ±19°.

Conclusions:

  • The developed bidirectional quasi-endfire patch antenna offers a superior low elevation angle and compact size compared to existing designs.
  • The antenna is well-suited for demanding wireless communication applications in mobile environments.